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Coupang LeetCode Questions 2026

Browse LeetCode problems frequently asked by Coupang. Filter by difficulty and timeframe to focus your interview prep.

Last updated: 20 May 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Regular Expression Matching	HARD	62.5%	StringDynamic ProgrammingRecursion
Design In-Memory File System	HARD	62.5%	Hash TableStringDesignTrieSorting
Subsets	MEDIUM	100%	ArrayBacktrackingBit Manipulation
Word Break	MEDIUM	100%	ArrayHash TableStringDynamic ProgrammingTrieMemoization
LRU Cache	MEDIUM	87.5%	Hash TableLinked ListDesignDoubly-Linked List
Number of Islands	MEDIUM	62.5%	ArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix
Range Module	HARD	87.5%	DesignSegment TreeOrdered Set
Course Schedule	MEDIUM	87.5%	Depth-First SearchBreadth-First SearchGraph TheoryTopological Sort
Find Pivot Index	EASY	87.5%	ArrayPrefix Sum
Split BST	MEDIUM	87.5%	TreeBinary Search TreeRecursionBinary Tree
Longest Substring with At Most K Distinct Characters	MEDIUM	87.5%	Hash TableStringSliding Window
Design Twitter	MEDIUM	62.5%	Hash TableLinked ListDesignHeap (Priority Queue)
Decode String	MEDIUM	100%	StringStackRecursion
LFU Cache	HARD	100%	Hash TableLinked ListDesignDoubly-Linked List
Longest Duplicate Substring	HARD	75%	StringBinary SearchSliding WindowRolling HashSuffix ArrayHash Function
Increasing Triplet Subsequence	MEDIUM	50%	ArrayGreedy
Sliding Window Maximum	HARD	75%	ArrayQueueSliding WindowHeap (Priority Queue)Monotonic Queue
Longest Repeating Substring	MEDIUM	75%	StringBinary SearchDynamic ProgrammingRolling HashSuffix ArrayHash Function
Single Element in a Sorted Array	MEDIUM	62.5%	ArrayBinary Search
Group Anagrams	MEDIUM	62.5%	ArrayHash TableStringSorting

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